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To czZZlfwz-omz'timag/eoncermlf i 2 f Be ittknowiilthat 1,; YARRENALDRicH, of Lowellriinthe "countylof Middlesex and State i ofMassachusetts, have invented a new and `useful Improvementfin *AngularTraverse-Lathes; and "Ixdo `lhereby f declare `that `the same is `fullydescribedand represented @panyingy` drawings,1l letters, gures, and refierences, thereof," i i j JThe `said drawing side view` of thelathepalcross section of it, and a` horizontal section ofthe tool post car-`riage,f"the figures in said drawing being `marked respectivelyl, 2,3and 4. inthe said drawings A2 denotestheniain `bedforframegofaturninglathe, on which irests""fa`nd moves ina longitudinal direction acarriage B2.`\I `Thiscarriage supports a secuponitin a transversedirection or inone attrib it-angles tothatin which said cariiriageaB2,is movedgon the frame A2.` The clamp screws i orequivalentcontrivancesby which it may be clampedjfirmly to the caragainsta gib Z; p l On thecarria,` g;e`E,` isfanothercarriage F, which isj` capable`ofbeingrevolved horizontally thereon and` of: being conned inianypositionby `clamp `screvvsfm, m, and nut-s `o, 0,' the heads ofthescrewsbeingfixed in a dovetailed annular groove formedaround p in.` and belowlthewtop `surface of the. car-` wriage `There is another `carriage G,`which may be "termed the.toolpostgcarriaga its object being tosupportfone or more tool posts C2,`

being lmadeto operate the usual manner in a` rectilinear. direction, and"it `is, provided with a clamp screwas seen at z` in Figs. l, 3 ande,such screwffbeing made to operate tail IG', ofthe carriage@ Y l*"AshaftD, extends updthrough the middle of the two carri`a,g ,r"e`sEiand` F,and through ja cylindrical passage whose diameter cor-` responds withthat of the shaft, and so as to friagesand `on itsaXis, shaft is pro``videdfwith twowoiun *gears H2, I2-the upper of whichworls 'into a screwn, supinthe following specification andthe accomf` exhibits aI rear orback `hollow or tubular screw b.

ond [carriage E, which ist made to traverse `carriage E, is providedlwith one or `more riage B2, thesaid clamp screw or screwsagainst a gibp, that rest-s," against :the dovepermit theshaft `to` freelyrotate inthe car-I f y UNTEDSTATES-maw y l spefcieatqafof Letters ratjene ,N6412,662, dated *April 1o, i855. i

`oftheframe A2. AIt may be driven from the vported in the tool carriage`Gryasi seen in` fFigs. 3 and `4. Theother wormgear `engages with a longscrew b, sustained by Y the carriage B2.1 i l Y headstock by suitablegearing, in order that' itinay impart rotary motion to a beveled geara., supported by the carriage B2.` The said gear a, works into a gear F2fixed on the lower end of a vertical shaft P2 (see Fig. `which carriesanother beveled gear B, that workslinto al gear B, fitted to turnloosely on a ljournal projecting` fromI the The gear B is clamped to theshaft, at will, by means of a long screw rod c, whose friction button orhead, d, is drawn against the gear by means ofa clamping screw nut L,see Fig. 3 ;L such i clainpingnut serving to draw the gear up to ashoulder formed on the shaft or journal of the screw. i

If we now suppose'the gear B, to be clamped to the screwV Zi, the saidscrew b put inl` revolution, the screw i tightened or screwed hard up,and the screw h, to be unscrewed or loose; under this state of thingsthe spindle D, will be revolved and by the action of its worm gear, I2,in the screw n, the block or carriage G, will be caused to traverse in arectilinear path whatever may be the direction given to such path, bythe adjustment `of the carriage F on the carriage E. 1 If the screw` t,be tightened and the screw z' loosened, the spindle D cannot revolve,consequently the carriage E, carrying with it the carriages or blocks Fand G, will be made to traverse on the main carriage B2 in the directionof the `screw b. such carriage Gr, is atlaptedto the carriage F, so astotraverse or slide onit` horizontally Figs. 1 and 2 of the drawingsexhibit beside my invention as above described sun- Y dry parts of aturning lathe to which no reference need be made as they constitute no`part of my invention, and are common to Which it is sustained; nor do Iherein claim the peculiar mechanism connected With the three carriagesand described in the specification of my Letters Patent, dated `March15th, A.y D. 1853, such combination being composed of what are thereinexhibited as the splined shaft U, the movable bevel .gear V, thevertical yshaft and its bevel gears W, Y, Y, the horizontal shaft X,gears c, g, and screw I, and its female screw atlixed to the tool restcarriage H.

Having invented a simpler combination of mechanical parts for suchpurpose, and which although an equivalent to an element or device in thecombination 4wherein it is employed, is by no means analogous to such

